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Super Title 2018 KAIST 세미나
Title Non-symplectic index of K3 surfaces over odd characteristic
Speaker 장준명  (  울산대학교  ) Date 2018-06-01
Host KAIST Place KAIST
VOD    
The non-symplectic index of an algebraic K3 surface is the order of the image of the representation of the automorphism group of the K3 surface on the global two forms. If the base field is the complex field, the non-symplectic index is finite and its Euler phi value is at most 20. In this talk, we will see if the base field is of odd characteristic and the K3 surface is of finite height, we have a similar result through a lifting argument. Also we calculate the non-symplectic index of all supersingular K3 surfaces over a field of characteristic at least 5 using the crystalline Torelli theorem.

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